Princeton University

School of Engineering & Applied Science

A programmable quantum computer module based on trapped ions

Dr. Norbert Linke, University of Maryland
Bowen Auditorium
Monday, April 17, 2017 - 12:00pm

Trapped ions are a promising candidate system for a scalable quantum computer. Certain ion species provide magnetic field insensitive "atomic clock" qubits with long coherence times, and optical schemes for near-unity state preparation and measurement. We present a modular quantum computing architecture comprised of a chain of 171Yb+ ions with individual Raman beam addressing and individual readout [1]. We use the transverse modes of motion in the chain to produce entangling gates between any qubit pair. This creates a fully connected system which can be configured to run any sequence of single- and two-qubit gates, making it in effect an arbitrarily programmable quantum computer that does not suffer any swap-gate overhead [2].
After an introduction to the ion trap platform, recent results from different quantum algorithms on five ions will be presented.

[1] S. Debnath et al., Nature 563:63 (2016)
[2] NML et al., PNAS 114 13:3305 (2017)

Joint Quantum Institute, University of Maryland Department of Physics and National Institute of Standards and Technology, College Park, Maryland 20742

This work is supported by the ARO with funding from the IARPA MQCO program and the AFOSR MURI on Quantum Measurement and Verification.